resumo
The first lanthanopolyoxometalate-supported bifunctional periodic mesoporous organosilica (BPMO) composite is here reported. The incorporation of decatunsgstoeuropate anions ([Eu(W5O18)(2)](9-)) within the porous channels of an ethylene-bridged TIVIAPS-functionalized BPMO produced a luminescent material exhibiting a strong red emission under UV irradiation. Photoluminescence studies showed an efficient energy transfer process to the lanthanide emitting center in the material (antenna effect). A significant change in the coordination environment of Eu3+ ions was observed after its incorporation into the TMAPS-functionalized material. The possible reason for this is discussed within the paper. (C) 2016 Elsevier Inc. All rights reserved.
palavras-chave
INTRAMOLECULAR ENERGY-TRANSFER; HYBRID MATERIALS; DESULFURIZATION PROCESS; DEEP DESULFURIZATION; CATALYTIC-ACTIVITY; LANTHANIDE IONS; ETHANE-SILICAS; ORGANIC GROUPS; LUMINESCENT; EUROPIUM
categoria
Chemistry; Science & Technology - Other Topics; Materials Science
autores
Granadeiro, CM; Ribeiro, SO; Kaczmarek, AM; Cunha-Silva, L; Almeida, PL; Gago, S; Van Deun, R; de Castro, B; Balula, SS
nossos autores
Carlos Miguel Cardeal Enes Granadeiro
Bolseiro de pós-DoutoramentoGrupos
agradecimentos
This work was supported by the Associate Laboratory Research Unit for Green Chemistry - Technologies and Processes Clean - LAQV which is financed by national funds from FCT/MEC (UID/QUI/50006/2013) and co-financed by the ERDF under the PT2020 Partnership Agreement (POCI-01-0145-FEDER - 007265). The authors also acknowledge the finantial support by CENIMAT, I3N (UID/CTM/50025/2013), the Portuguese Nuclear Magnetic Resonance Network (PTNMR) and for the post-graduation fellowships SFRH/BPD/73191/2010 (to CMG), SFRH/BPD/111168/2015 (to SG) and SFRH/BD/95571/2013 (to SOR). AMK acknowledges Ghent University's Special Research Fund (BOF) for a Postdoctoral Mandate (project BOF15/PDO/091). RVD acknowledges the Hercules Foundation (project AUGE/09/024